Differential D18937 Diff 53198 head/sys/dev/tpm/tpm_tis.c

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head/sys/dev/tpm/tpm_tis.c

Show First 20 Lines • Show All 94 Lines • ▼ Show 20 Lines	static bool tpm_wait_for_u32(struct tpm_sc *sc, bus_size_t off,
uint32_t mask, uint32_t val, int32_t timeout);		uint32_t mask, uint32_t val, int32_t timeout);
static uint16_t tpmtis_wait_for_burst(struct tpm_sc *sc);		static uint16_t tpmtis_wait_for_burst(struct tpm_sc *sc);

char *tpmtis_ids[] = {"MSFT0101", NULL};		char *tpmtis_ids[] = {"MSFT0101", NULL};

static int		static int
tpmtis_acpi_probe(device_t dev)		tpmtis_acpi_probe(device_t dev)
{		{
struct resource *res;		int err;
int err, rid = 0;		ACPI_TABLE_TPM23 *tbl;
uint32_t caps;		ACPI_STATUS status;

err = ACPI_ID_PROBE(device_get_parent(dev), dev, tpmtis_ids, NULL);		err = ACPI_ID_PROBE(device_get_parent(dev), dev, tpmtis_ids, NULL);
if (err > 0)		if (err > 0)
return (err);		return (err);
		/Find TPM2 Header/
		status = AcpiGetTable(ACPI_SIG_TPM2, 1, (ACPI_TABLE_HEADER **) &tbl);
		if(ACPI_FAILURE(status) \|\|
		tbl->StartMethod != TPM2_START_METHOD_TIS)
		err = ENXIO;

/* Check if device is in TPM 2.0 TIS mode */
res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (res == NULL)
return (ENXIO);

caps = bus_read_4(res, TPM_INTF_CAPS);
bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
if ((caps & TPM_INTF_CAPS_VERSION) != TPM_INTF_CAPS_TPM20)
return (ENXIO);

device_set_desc(dev, "Trusted Platform Module 2.0, FIFO mode");		device_set_desc(dev, "Trusted Platform Module 2.0, FIFO mode");
return (BUS_PROBE_DEFAULT);		return (err);
}		}

static int		static int
tpmtis_attach(device_t dev)		tpmtis_attach(device_t dev)
{		{
struct tpm_sc *sc;		struct tpm_sc *sc;
int result;		int result;

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